LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.3 SIM detect trouble
USB Initial sequence of HB620T is :
VREG_USIM_2.85V(C427 of PM6650) go to 2.85V
→
USIM clock, reset and data triggered
→
USIM IF work (Schematic and place are refer to SIM technical brief)
- 78 -
Start
Work well?
VREG_USIM_2.85V?
USIM_P_CLK is run?
Change the Main board
End
Check C427,C438
Yes
No
YES
NO
Re- insert the SIM card
Change SIM card
Work well?
End
Yes
No
Start
Work well?
VREG_USIM_2.85V?
USIM_P_CLK is run?
Change the Main board
End
Check C427,C438
Yes
No
YES
NO
Re- insert the SIM card
Change SIM card
Work well?
End
Yes
No
Z3X-BOX.COM
Summary of Contents for HB620
Page 202: ...Note Z 3 X B O X C O M ...
Page 203: ...Note Z 3 X B O X C O M ...